VulnSocial

CVE-2026-73458Disclosure

LOWCVSS 9.2 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

On affected platforms running Arista EOS with authenticated Bidirectional Forwarding Detection (BFD) sessions configured, a specially crafted packet can cause the BFD session(s) to go down. This may result in undesirable network changes because various routing protocols monitor status on BFD session(s).

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0.0/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-303

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • 1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-09-17: 1Technical Details · 2026-09-17: 109-17
Signal classification1 categories
Disclosure
1100.0%
Full discourse1 post
  • DFIR Lab@DFIR_Lab
    Disclosure

    🚨 HIGH SEVERITY: CVE-2026-73458 (CVSS 8.2) Arista EOS BFD vulnerability allows unauthenticated attackers to crash authenticated BFD sessions via crafted packets, causing routing disruptions. Affected: Arista EOS with authenticated BFD #CVE #Vulnerability #PatchNow https://t.co/vDy9bXrUc9

    Post summary

    The tweet announces CVE-2026-73458 affecting Arista EOS BFD with a CVSS 8.2, providing specific technical details about the vulnerability (unauthenticated crash of authenticated BFD sessions via crafted packets), but does not name any exploit tool, PoC, active exploitation, or specific patch/workaround—only a #PatchNow hashtag. Classification is Disclosure as the primary content is vulnerability announcement and technical description without remediation specifics.

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    138 followersView on X

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